Boring type mining machine having rotary cusp trimmer bars



March 4, 1958 F. cARTLlDG-E 2,825,545

BORING TIPE MINING MACHINE HAVING ROTARYGUSP TRIMMER BARS Frank Carlidge BY Wfl/wma Argom/Ev March 4, 1958 F. cARTLlDGE 2,825,545

BORING TYPE MINING MACHINE HAVING ROTARY CUSP TRIMMER BARS Filed Nov. l5, 1956 3 Sheets-Sheet 2 IN V EN TOR.

Frank Carlidge ,nA/M7 M ATTORNEY March 4, 1958 F; cARTLlDGE 2,825,545

` BORING TYPE MINING MACHINE HAVING ROTARY CUSP TRIMMER BARS Filed Nov. 13, 1956 Y3 Sheets-Sheet 5 Fig. 7

n IN VEN TOR.

Frank Carddge ATTORNFV BoRING TYPE MINING .MACHINE HAvnsiG ROTARY cUsP rnIMMER BARS Frank Cartlidge, Chicago, lll., assgnor to Goodman Manufacturing Company, Chicago, Ill., a corporation of Illinois v.

Application November 13, 1956, Serial No. 621,588 Claims. (Cl. 262'7) pairs of boring heads, so as to trim or cut oit the depend-k ing and upstanding cusps left between said boring heads. The present invention relates particularly to bit-carrying trimmer bars rotatable on horizontal axes, of the kind broadly disclosed in Patent No. 2,734,731, issued Feb- Y ruary 14, 1956. f

in .a co-pending application, Serial No. 619,812, tiled November l, 1956, 'owned by the assigneeV of this invention, means are disclosed for oscillating the trimmer bars in endwise direction while the machine is in operation so as to enhance the eitectiveness of the cutting action, while requiring a relatively small number of cutter bits. Vin that application, trinuner bars are journalled 'in 'supports whichare localized'within the paths ot movement Vof the boring heads so that the trimmer bars are oscillated about relatively long radii rather than being oscillated directly in line with their respective axes.

Among the objects of the present invention is to provide a variant form and arrangement of rotary trimmer bars and supporting means therefor which causes the trimmer bars to be oscillated longitudinally of their respective axes rather than in slightly'arcuate paths.

A further object of the invention is to provide supporting means for the oscillating trimmer bars which permit the latter to be adjusted vertically so as to cut at dilerent levels relative to the oor or roof of the mine.

Other objects and advantages ofthe invention will appear from time to time as the following description proceeds':

The invention may best be understood by reference to the accompanying drawings, in Which- Figure l is a front'view of a mining machine con-` structed in accordance with the invention;

Figure 2 is an enlarged detail section taken on line-22 of Figure l;

Figure 3 is u'r'e 2;

Figure 4 is a detailsection Vtaken on line 4`4 of Figure l; 1 s

Figure 5 is a detail section taken on line 5 5 of Figure 4;

'Figure 6 is a detail section taken on line Geli of Figure 5; and

Figure 7 is a diagram of the hydraulic circuit employed for oscillating the rotary .cutter bars along their axes.

Referring to details of the embodiment of the invention illustrated in the drawings, Figure 1 shows the front end viewof a miningmachine having t1-horizontally elongated trarne .10 which .rotatably supports four laterally spaced a detail section taken on line 3-3 of Figrice 2 boring heads 11,12, 13 and 14. In the illustrative form shown, each of the boring heads consists of single 'rotary arms 11a, 12a, 13a and 14a, respectively, having similar arcuate cutter bit supports 15 at their outer ends, and a cutter bit support 16 intermediate lits ends. Each of said rotary arms is supported at its inner end on a drive shaft,

the shaft of one of the outermost heads 14 being shown at 14h in Figure 4, and the shaft of the adjacent -head 13 being shown at 13e in Figures 2 and 3. The four cutter heads are rotated as usual at equal speeds and in synchro; nized relation to each other, the two heads at the fleft side of Figure l being preferably rotated in counterclckwise direction, and the heads at the right sid being rotated in clockwise direction, so that both pairs ot heads tend to sweep the cuttings inwardly 'toward `'a center opening or throat 18 for loading on the front end of a cuttings conveyor 19, which carries the cuttings along the frame for discharge at the rear of the machine, as is common with machines of this type.

Referring now more particularly to the vtrimmer bars which form the subject matter of the present invention,

an upper bar support 2t) and a lower bar support 21 ir'e" disposed respectively along the top and bottome'dge's vof the trame 1li, immediately to the .rear of the paths "o'f movement of the boring heads. Each of saidV supports have similar trimmer bar sections 23 rotatably journall'ed along their front faces. In the form shown herein, the upper and lower bar supports each have two pairs of trimmer bar sections in longitudinal alignment With eachother, and each -bar section is driven Vfrom the adjacent' outermost cutter head.

The Ilower trimmer bar support 21 extends the widthV of the machine between the axes of the outermost cutter heads 11 and 14, and is vertically adjustable relative to the frame 16 by a pair of piston rods 25, 25 Working iii hydraulic cylinders 26, 26 Xed to thefront end of saidV same as has been previously employed with cutter-chaincarrying trimmer bars, excepting for the modifications' required -for mounting, driving 'and oscillating the rotary bar sections 23 on their supports, as will now be described. Since the four trimmer bar sections v23 and their driving and oscillating means are identical, ade-v tailed description of the bar section 23 at the lower right-s hand side of Figure l will suflice for the understandingy of all of said sections. v

Each trimmer bar section 23'consists of shaft 30 havingV ycylindrical inner and outer Vcutter portions 31 and 32.

The shaft 30 has a reduced inter-mediate portion 37.0,

journa'lled in a bearing 33 and a reduced end portion 42"' extending into a bearing housing 46.

Each of said cylindrical cutter portions has a s rib 34 on its outer surface along which cutter bit sockets 35 are formed in spaced relation for receiving cutter bits- 36 which are detachably secured in said sockets by .suite able means. In the form shown, all of the cutter bits are disposed in the same diametrical plane along. the trimmer bar.

When the cutter bits 36 are fixed in operative position, the ends of their blades 37 move in paths extending vertically above and below the' trimmer support 21 so as Ato cut `a clear path for said support as the machine is advanced. A

The ybearing member 33 through which the shaft 30 passes, is disposed to the rear of the boring head Y1'3, inv

the lower center part of the bore pattern of the" latter,

so that said boring head cuts a path for 'said Vbearing splined at 43 which has slidable engagementin' splihed in? Patented Mar; 4, 195,8

nel'V -bore44'7of`a worm-45 rotatably Ysupported in the housing 4,6, ixed on the outer end of the lowerrbar sup'- port 21,. As will also be seen in Figure 1, the Vhousing l 46 just mentioned is disposed to the rear oftheboring headl14at the point` of maximum'. cutting, diameter Y ther "Liso that ,saidY boring head/cuts'az path for s aid V housingl '1 f Y Y 1' The wormf45V is drivenY from a,wornrwheel47V ro-A j ta'tably mounted on an upright axes in bearings A47' and V47'.'v inthe housingY 46 as shown -in FigureV 4. In theY form Vshown herein, the'housing consists of 'an enlargediforwardly Vprojecting portion of the lower bar 'in Y support` 21, enclosed at Vthe. bottom by a'dertacrhablecover coverplate 49 and a sealing plate 50.

Y"The Worm,wheel 47has'a splined interior indicated at' Y SLengag'ed by a'splined end 52 of anV upright shaft53.

The latter. shaft has `a. bevelrgear 54j suitably fixed at its of spaced contact members 78'a'nd 279 so as to direct f the flow ofid from the pressure line 75 to Va'return line 80 either through Vlines 81 or 82 whichlead to i opposite sidesofthe motorsY 70Y andV 71.V The arrange= Y ment is such that when pressure from line V75 isintioduced in the line 181, it'vvwlillbegcoiiductd through 81a to the upper end of 'the cylinder ofrmotor70, thus` Vmovingure pistn im of said metprdowwardly toffee.;

the Ya'ri'r'l' Y65a sof sleeve Q65` in a.counterclockwisedirection: Y A second branch 81bfof thewline 81 is connected,tsov'rtglieY lower endof the'mtor'i'l so that when pressure isfil`VY troducedin said line; the piston-71a of motorjlfwill" rock tiiea'rmof the 'other rocking sleevevijtiI ifiY a '.cou'nterclockwise direction. v While pressure isV being vvfed i upper end andhaving bearing in a housing 55 carried on the; main Vbearinglsupport b for the Vdrive shaft 14b of tliejcutter head 14..' A bevel gear 56 is keyed at 57 to d Y api-ojecting hub portion v14eA of theV cutter head, which hub portion is keyed at 58 to the drive shaftV 14b. The

Y arrangement just described is ,suchgthat the-'upright ,shaft 53, vconnected to theworm gear 47 and the YVworm 45,V

willbe; driven "from the mainV drive shaft 14h :of the cutterl head Y14 and inrrturn will rotate the Ytwo ytrimmer bar Vsections'Sl and 32.v The teeth on the worm have a suciently steep pitch to permit from the worm wheel. t Y Y i i The trinimerY barv section' 23 ,is' arranged for 'endwis'e Yoscillation relative .to the cutter bar'supp'ort 21. f Asi-seen .Y j in FigresfZ and/3,1the bearing member YY33irwhich sup-V Yports the Y connecting shaft 36 .between Vthe cylindrical sections 31 and 32, is'slidably mount'edrrelative to theVY the worm tobe driven Y.

through line 81 andi-branch linesl 8; 1zzj' andi'Sl-B 1to the i upper and lower ends of moto'rrsnt) and 71,'pressu1er. Y will be relieved respectivelyl from the lower and upper@YV ends of said'rnotors to Ybranch'rlines 82a and VY82b7 con- Y nect'edfrespec'tively tothe lower and Yupper `ends ofU the Ymotors 70 and 71 and thence through line 82v and valve i V76 to the return line 80 leadi'ngftorthe supply tank-34.Y

` This rocking movement will continueV untlv'arcontacti.

nger 83 on one. of the rockingarrns 65a Willengage the Y contact member 79 ofA liuid switchg76, whereupon tli' Y lower-supporting bar'21 by :a rearwardly projectingY arm 60,;having'a socketl'on its inner Vend engaged by aV ball162aon the lower end of a rod 63.1 The arm'60 con- Y fnectin'gthecbearing' memberv 33 to the ballV andfsocket Y Vjoint61,62 is'held Vin place on the supporting bar 21 by a'plate 66 extending over theV *arml 60.Y and: detachably connected', at opposite endsto-the supporting bar as seen-in Figures 2'and`3. 'The rod 63 is telescopically Y mountedinfa'cylindrical arm 64-forming Yapart V.of aYY rocking collarY 65 pivotally mounted on Ythe bearing 'support'13b V"ofthe cutter head 13.

Y YjMeans`arepr'ovided for oscillating both/the gupper;

and lower pairsV ofrtrimmer bars 23, 23Von theirrespec-Y I VVtivesujgiports'ZD and 21 by hydraulic powerQas'shoWn in greaterdetail in the diagram of Figure 7. Aswill be e seen from this figure, rocking collars 65, 65 are mounted;

Y. on thebearing supports V12b and13b of the Yinnercutter heads 12 Y'and .13,iand are connected `for-sirriultaneous rockingfmovement by aV link 67 pivotally'connected at.V opposite' ends to the 'cylindrical arms 64a correspondingVY switch will befthiow'ri into a second position togeve'rse' the How of uid to the moto'r'sz70 and 71 and Ycause the i rocking sleeves to rock in a clockwisedirection Yuntil V `the Contact finger 83 again reverses the;direclti0'n of How byengagement with' theA contactarmV 78. Y i. VAlthough I Vhave'aisvhown and described a-certain emli bodiment of myinvention, it will be 'understood' thatthef invention isnot limited to `tlie'exaict construction showinr i, and described herein, butlthatvarious changesiand'modif fic-ationsmay be made without; departing. fromfthespirit. f

and'iscope'of'the Vinvention -as denedin the appended. claims. f Y

. the cusp AVleft between said adjacent boring heads,jsaid J i trlmmer bar'inc'ludingnanV elongated'supportingbar, a

rotary vcutter-'carrying Vbar along the front Yoflsaid suppprtfk ing bar to. cut a path in iront" of the'latter, means f0.1'y Tov Y Y tating said cutter baron its axis, andmeansfincluding@ a Vpair of laterally V*spaced teles'copically extensible'arins 1r *Y rockably mounted Von Ysaid 'fra'me forVA oscallatingY said cutter bar in said isupiio'rting bar axiallyiof 'saidYVc-utt'er, l

bar, and in a substantially fixed vertical'plane: i y

to'the'cylindrical arms 64 VVon the lower part of` said rock-V Y ing collars. The two telescopic rods'63 on said rocking rcollars are connectedbysimilar ball and socket joints to the'two'Y bearing members 33 of the lower trimmer bar sectionsYV 23, while the corresponding4 telescopic rods 63a-y extendingV from the top VVof Vthe rocking `collars65 s imilarlyfengage Vthe twoV bearing members 33 Ylof' the upper trimmerfbar sectionsY 23. The lower trimmer bar sections are oscillated along their axesY in reciprocal relation, to Vthe` upper trimmer bar sections by means yof a Y Y pair of oppositely acting Vhydraulicmotors 70,1.71of'the i cylinderjand piston type seeFigu'fe 7).V

."Ihwqemotors 70aud 71 Vare actuated by hydraulic prres-V Y f sure supplied thereto'fromta pump 72 having arrhigh pres-.7,

Y surefliiief73Y passing Vthrough a manual control valve.'74V

' versin'g Vvalve 76.VVV ThisV reversingY `valve is vof a con-Y ventional-type' jwell knowrrin YtheY art,: having .arot'atingV andV thence throughipre'ssure 1ine'7i5 to4 anY automatic e alve'ielement 77 adapted to be throwninpne direction thY 'other'ibyrfa VVforked control level.` having Yaf pairi` q 2.7;The'structurelof"A `1 fwherein the fmeansfior` rotatingY the cutter bar on the supporting 'barincludesY power' connections from1the;;franeYindependentofV the'Y oscillatingmeans'.fV j Y. Y. f

*n i Y3. '.Ihe structurejof claimfl,whereiiitheV supportingba'rfi is adjustable; vertically Yrelative to `th'e'fframe,V and theft] '60,

means'fo'r rotating thecutter baron thesupportingfbar f Yinclude telescopicallyi extensible Vpower connections 'from :y i e Y fuectionforfrotating theicutterfbar Vcomprises-adriveger 65j i frame.k for Y parallel Ymolekfmgl movementY to" Land'.V :from-i1l opposite srldes'of verticalpiaues including the axesoLtwdk theirame.r .Y *Y 'Y 4. The structure-of claim 3, wherein the powergon`Y on the framma gear-train on said'supporting ybar in, cludmg a gear on'an upright axisdriving agear onlthef axis Yofthe cutter'rbanfa'n extensible drivefshafitlconneC-f i `Y tion between the drive gear pn the :framejandftheiirsti namedV gearYV on theisupporting bar, and*anotherextensi-` ble drive ccrmiaection-betweenthe` second naniedgear'ionV Y the supporting barjandithe cutter bar.

V5. Thegstructure jot claim 3, Ywherein"theextensible'frV armsV for oscillating Ythe'feut-ter'barrare fulcrumed Yonthez- 1i ,i

of the boring heads, and the ends of the extensible arms FOREIGN PATENTS are pivotally connected to the supporting bar. 316,292 Germany Nov. 24, 1919 References Cited in the le of this patent UNITED STATES PATENTS 1,283,880 OToole NOV. 5, 1918 2,734,731 Cartlidge et al Feb. 14, 1956 

